28585 has 4 divisors (see below), whose sum is σ = 34308. Its totient is φ = 22864.

The previous prime is 28579. The next prime is 28591. The reversal of 28585 is 58582.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28579) and next prime (28591).

It can be written as a sum of positive squares in 2 ways, for example, as 13456 + 15129 = 116^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 28585 - 2¹³ = 20393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (8577).

2²⁸⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

28585 is a deficient number, since it is larger than the sum of its proper divisors (5723).

28585 is an equidigital number, since it uses as much as digits as its factorization.

28585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722.

The product of its digits is 3200, while the sum is 28.

The square root of 28585 is about 169.0709910067. The cubic root of 28585 is about 30.5759105266.

The spelling of 28585 in words is "twenty-eight thousand, five hundred eighty-five".